TWM580123U - Decompression device of internal combustion engine - Google Patents

Decompression device of internal combustion engine Download PDF

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Publication number
TWM580123U
TWM580123U TW107216307U TW107216307U TWM580123U TW M580123 U TWM580123 U TW M580123U TW 107216307 U TW107216307 U TW 107216307U TW 107216307 U TW107216307 U TW 107216307U TW M580123 U TWM580123 U TW M580123U
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Taiwan
Prior art keywords
cam
decompression
exhaust
combustion engine
internal combustion
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TW107216307U
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Chinese (zh)
Inventor
施俊傑
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光陽工業股份有限公司
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Priority to TW107216307U priority Critical patent/TWM580123U/en
Publication of TWM580123U publication Critical patent/TWM580123U/en
Priority to US16/554,523 priority patent/US20200173415A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio
    • F01L13/085—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio the valve-gear having an auxiliary cam protruding from the main cam profile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/004—Aiding engine start by using decompression means or variable valve actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0476—Camshaft bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2153—Means for counteracting cylinder pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/02—Camshaft drives characterised by their transmission means the camshaft being driven by chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/01—Absolute values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/02—Formulas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/035—Centrifugal forces

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

本創作係有關於一種內燃機的減壓裝置，該減壓裝置係組設於凸輪軸上，該凸輪軸具有進氣凸輪及排氣凸輪，該排氣凸輪具有凸部與基圓部，該排氣凸輪可頂推一排氣搖臂；該減壓裝置包括有一設於該凸輪軸上並鄰近於該排氣凸輪的基盤、一連結於該基盤的配重擺臂、一勾設於該基盤與該配重擺臂之間的彈性元件、一連接於該排氣凸輪上並可被該配重擺臂帶動的減壓凸輪元件及一穿設於該基盤與該配重擺臂的軸桿，該減壓凸輪元件由該配重擺臂朝該排氣凸輪方向依序設有驅動段、減壓凸輪段及轉軸段，該減壓凸輪元件可被該配重擺臂轉動一角度，該減壓凸輪段具有弧形部與位於該弧形部相對側的第一切口部與第二切口部；藉此可提升該減壓裝置的泛用性，進而提升該減壓裝置的使用功效。 The present invention relates to a pressure reducing device for an internal combustion engine. The pressure reducing device is arranged on a camshaft. The camshaft has an intake cam and an exhaust cam. The exhaust cam has a convex portion and a base circle portion. The air cam can push an exhaust rocker arm; the decompression device includes a base plate provided on the cam shaft and adjacent to the exhaust cam, a weighted swing arm connected to the base plate, and a hook attached to the base plate An elastic element between the counterweight swing arm, a decompression cam element connected to the exhaust cam and driven by the counterweight swing arm, and a shaft rod passing through the base plate and the counterweight swing arm The decompression cam element is sequentially provided with a driving section, a decompression cam section, and a rotating shaft section from the counterweight swing arm toward the exhaust cam direction. The decompression cam element can be rotated by an angle by the counterweight swing arm. The decompression cam segment has an arc-shaped portion and a first notch portion and a second notch portion located on the opposite side of the arc-shaped portion; thereby, the versatility of the decompression device can be improved, and the use effect of the decompression device can be improved. .

Description

內燃機的減壓裝置 Decompression device for internal combustion engine

本創作係有關一種內燃機的減壓裝置，尤指一種可使該內燃機可於低轉轉速時即可達成啟動減壓效果，進而能便利啟動與控制啟動轉速，以及該內燃機可以預設轉速值來減壓，俾能提升該減壓裝置的減壓效果與泛用性之內燃機的減壓裝置。 This creation relates to a decompression device for an internal combustion engine, and in particular to a method that enables the internal combustion engine to achieve a starting decompression effect at a low rotational speed, thereby facilitating start-up and control of the starting rotational speed, and the internal combustion engine can preset a rotational speed value To reduce the pressure, the pressure reducing effect of the pressure reducing device and the pressure reducing device of a general-purpose internal combustion engine can be improved.

如圖一所示，內燃機1於啟動伊始，為避免設於內燃機1內的活塞11由下死點上升時阻抗過大，因此會於該汽缸頭12內凸輪軸13上設置一減壓裝置14。 As shown in FIG. 1, at the beginning of the internal combustion engine 1, in order to avoid excessive resistance when the piston 11 provided in the internal combustion engine 1 rises from the bottom dead center, a pressure reducing device 14 is provided on the camshaft 13 in the cylinder head 12.

該減壓裝置14係設於該凸輪軸13的排氣凸輪131之側旁，藉由該減壓裝置14於該內燃機1欲啟動伊始來頂推該排氣搖臂15，該排氣搖臂15被該減壓裝置14頂推後，進而來令該排氣閥門(圖式中未繪出)作一微開的開度，藉此當該內燃機1啟動伊始，該活塞11由下死點向上推升時對於燃燒室16產生的空氣壓力，該活塞11上升所產生的空氣壓力即可由該微開的排氣閥門處排出，進而可減少該活塞11由下死點向上推升時的阻抗，俾能便利該內燃機1的啟動。 The decompression device 14 is disposed beside the exhaust cam 131 of the camshaft 13. The decompression device 14 pushes the exhaust rocker arm 15 at the beginning of the internal combustion engine 1 to start, and the exhaust rocker arm 15 is pushed up by the pressure reducing device 14, and then the exhaust valve (not shown in the figure) is opened slightly, so that when the internal combustion engine 1 starts, the piston 11 starts from the bottom dead center. For the air pressure generated by the combustion chamber 16 when pushed up, the air pressure generated by the rise of the piston 11 can be discharged from the slightly opened exhaust valve, thereby reducing the impedance when the piston 11 is pushed up from the bottom dead center. Therefore, the starting of the internal combustion engine 1 can be facilitated.

該內燃機1藉由於凸輪軸13的一側設一減壓裝置14，固然可減輕該活塞11由下死點向上推升時的阻抗；然而如何來確保該減壓 裝置14的動作性，以及如何令該減壓裝置14可泛用各種排氣量的內燃機1，應是內燃機業者亟待克服之課題。 The internal combustion engine 1 is provided with a pressure reducing device 14 on one side of the camshaft 13, although it can reduce the impedance of the piston 11 when it is pushed up from the bottom dead center; however, how to ensure the pressure reduction The operability of the device 14 and how to make the decompression device 14 widely usable to the internal combustion engine 1 with various exhaust volumes should be urgently overcome by the internal combustion engine manufacturers.

本創作主要目的在於提供一種內燃機的減壓裝置，藉此能克服習用內燃機的減壓裝置泛用性不足之缺失。 The main purpose of this creation is to provide a pressure reducing device for an internal combustion engine, thereby being able to overcome the lack of universality of the pressure reducing device for a conventional internal combustion engine.

為此，本創作第1項之主要技術手段，乃在提供一種內燃機的減壓裝置，該減壓裝置係組設於凸輪軸上，該凸輪軸具有進氣凸輪及排氣凸輪，該排氣凸輪具有凸部與基圓部，該排氣凸輪可頂推一排氣搖臂；該減壓裝置包括有一設於該凸輪軸上並鄰近於該排氣凸輪的基盤、一連結於該基盤的配重擺臂、一勾設於該基盤與該配重擺臂之間的彈性元件、一連接於該排氣凸輪上並可被該配重擺臂帶動的減壓凸輪元件及一穿設於該基盤與該配重擺臂的軸桿，該減壓凸輪元件由該配重擺臂朝該排氣凸輪方向依序設有驅動段、減壓凸輪段及轉軸段，該減壓凸輪元件可被該配重擺臂轉動一角度，該減壓凸輪段具有弧形部與位於該弧形部相對側的第一切口部與第二切口部。 To this end, the main technical means of the first item of this creation is to provide a pressure reducing device for an internal combustion engine. The pressure reducing device is arranged on a camshaft. The camshaft has an intake cam and an exhaust cam. The cam has a convex portion and a base circle portion. The exhaust cam can push against an exhaust rocker arm. The decompression device includes a base plate provided on the cam shaft and adjacent to the exhaust cam, and a base plate connected to the base plate. Counterweight swing arm, an elastic element hooked between the base plate and the counterweight swing arm, a decompression cam element connected to the exhaust cam and driven by the counterweight swing arm, and a penetrating device The base plate and the shaft of the counterweight swing arm, and the decompression cam element is sequentially provided with a driving section, a decompression cam section, and a rotating shaft section from the counterweight swing arm toward the exhaust cam direction. Rotated by the counterweight swing arm at an angle, the decompression cam segment has an arc-shaped portion and a first cutout portion and a second cutout portion located on opposite sides of the arc-shaped portion.

為此，本創作第2項之主要技術手段，乃在提供一種內燃機的減壓裝置，該減壓凸輪段具有弧形部與位於該弧形部相對側的第一切口部與第二切口部之間進一步設有一第三切口部。 To this end, the main technical means of the second item of the present invention is to provide a decompression device for an internal combustion engine. The decompression cam section has an arc portion and a first cutout portion and a second cutout located on the opposite side of the arc portion. A third notch portion is further provided between the portions.

為此，本創作第3項之主要技術手段，乃在提供一種內燃機的減壓裝置，該減壓凸輪元件的轉軸段設有一直徑較小的藏油部。 To this end, the main technical means of the third item of the present invention is to provide a pressure reducing device for an internal combustion engine, and a rotating shaft section of the pressure reducing cam element is provided with a small diameter oil reservoir.

為此，本創作第4項之主要技術手段，乃在提供一種內燃機的減壓裝置，由徑向觀示，該減壓凸輪段係位於該排氣凸輪面寬之外且呈並列方式設置。 To this end, the main technical means of item 4 of this creation is to provide a pressure reducing device for an internal combustion engine, which is viewed from the radial direction, and the pressure reducing cam segment is located outside the width of the exhaust cam surface and is arranged side by side.

為此，本創作第5項之主要技術手段，乃在提供一種內燃機的減壓裝置，該減壓凸輪段的轉動中心與該排氣凸輪的轉動中心呈偏離並且成平行設置。 For this reason, the main technical means of the fifth item of the present invention is to provide a pressure reducing device for an internal combustion engine. The rotation center of the pressure reducing cam segment is offset from the rotation center of the exhaust cam and is arranged in parallel.

為此，本創作第6項之主要技術手段，乃在提供一種內燃機的減壓裝置，該弧形部的外端緣凸出於該排氣凸輪的該基圓部的外端緣的高度不大於0．9mm。 For this reason, the main technical means of item 6 of this creation is to provide a pressure reducing device for an internal combustion engine. The outer end edge of the arc portion protrudes from the outer end edge of the base circle portion of the exhaust cam. More than 0.9mm.

為此，本創作第7項之主要技術手段，乃在提供一種內燃機的減壓裝置，該弧形部的外端緣凸出於該排氣凸輪的該基圓部的外端緣高度約略為0．1mm至0．8mm。 For this reason, the main technical means of item 7 of this creation is to provide a pressure reducing device for an internal combustion engine. The outer end edge of the arc portion protrudes from the outer end edge of the base circle portion of the exhaust cam. 0.1mm to 0.8mm.

為此，本創作第8項之主要技術手段，乃在提供一種內燃機的減壓裝置，該弧形部的外端緣凸出於該排氣凸輪的該基圓部的外端緣高度約略為0．6mm至0．8mm之間。 To this end, the main technical means of item 8 of this creation is to provide a pressure reducing device for an internal combustion engine. The outer end edge of the arc portion protrudes from the outer end edge of the base circle portion of the exhaust cam. 0.6mm to 0.8mm.

為此，本創作第9項之主要技術手段，乃在提供一種內燃機的減壓裝置，該排氣搖臂的排氣搖臂樞軸中心至頂推滾輪轉動中心的長度小於排氣搖臂樞軸中心至頂推凸柱中心的長度。 To this end, the main technical means of item 9 of this creation is to provide a pressure reducing device for an internal combustion engine. The length of the pivot center of the exhaust rocker arm from the pivot center of the exhaust rocker arm to the pivot center of the ejection roller is shorter than that of the exhaust rocker arm pivot. The length from the center of the shaft to the center of the jack.

為此，本創作第10項之主要技術手段，乃在提供一種內燃機的減壓裝置，該基盤係與該凸輪軸一體成形所構成，且位於鄰近該排氣凸輪處；該基盤呈扇形狀。 To this end, the main technical means of item 10 of this creation is to provide a pressure reducing device for an internal combustion engine. The base plate is integrally formed with the camshaft and is located adjacent to the exhaust cam. The base plate has a fan shape.

為此，本創作第11項之主要技術手段，乃在提供一種內燃 機的減壓裝置，由徑向觀示，該減壓凸輪段係位於該排氣凸輪面寬之外且呈並列方式設置；該排氣搖臂的一端凸設有頂推凸柱。 For this reason, the main technical means of item 11 of this creation is to provide an internal combustion engine. The decompression device of the machine is viewed from the radial direction, and the decompression cam section is located outside the width of the exhaust cam surface and is arranged in a side-by-side manner; one end of the exhaust rocker arm is provided with a push-out projection.

本創作藉由第1項之主要技術手段所能達成之功效在於：藉此可使該內燃機可於低轉轉速時即可達成啟動減壓效果，進而能便利啟動與控制啟動轉速，以及該內燃機可以預設轉速值來減壓，俾能提升該減壓裝置的減壓效果與泛用性。 The effect that this creation can achieve through the main technical means of item 1 is that this allows the internal combustion engine to achieve a starting decompression effect at a low revolution speed, thereby facilitating starting and controlling the starting speed, and the The internal combustion engine can be decompressed with a preset speed value, which can improve the decompression effect and versatility of the decompression device.

本創作藉由第2項之主要技術手段所能達成之功效在於：藉此可有效降低該弧形部相對側的高度，進而提升該減壓裝置使用效果與泛用性。 The effect achieved by the main technical means of the second item in this creation is that it can effectively reduce the height of the opposite side of the curved portion, thereby improving the use effect and universality of the decompression device.

本創作藉由第3項之主要技術手段所能達成之功效在於：藉此可減少機油濃度過高時的油阻抗對於該減壓凸輪元件轉動阻力的產生，進而可確保該減壓凸輪元件的轉動性。 The effect of this creation by the main technical means of item 3 is that it can reduce the oil resistance to the rotation resistance of the pressure reducing cam element when the oil concentration is too high, thereby ensuring the pressure reducing cam element. Turnability.

本創作藉由第4項之主要技術手段所能達成之功效在於：藉此可提升該排氣凸輪的使用壽命。 The effect achieved by the main technical means of item 4 in this creation is that it can increase the service life of the exhaust cam.

本創作藉由第5項之主要技術手段所能達成之功效在於：藉此可提升該排氣凸輪的使用壽命。 The effect that this creation can achieve through the main technical means of item 5 is that it can increase the service life of the exhaust cam.

本創作藉由第6項之主要技術手段所能達成之功效在於：藉此可提升該減壓裝置的減壓效果與降低噪音效果。 The effect of this creation by the main technical means of item 6 is that it can improve the decompression effect and noise reduction effect of the decompression device.

本創作藉由第7項之主要技術手段所能達成之功效在於：藉此可使該減壓裝置具備較佳的減壓效果。 The effect that this creation can achieve through the main technical means of item 7 is that this can make the decompression device have a better decompression effect.

本創作藉由第8項之主要技術手段所能達成之功效在於：藉 此可使該減壓裝置具備較佳的降低噪音效果。 The effect that this creation can achieve through the main technical means of item 8 lies in: This can make the decompression device have a better noise reduction effect.

本創作藉由第9項之主要技術手段所能達成之功效在於：藉此提升該排氣搖臂抵壓排氣閥門的效果。 The effect of this creation by the main technical means of item 9 lies in: by this, the effect of the exhaust rocker arm against the exhaust valve is improved.

本創作藉由第10項之主要技術手段所能達成之功效在於：藉此可減輕該基盤整體重量，以及便利該減壓裝置的組裝。 The effect of this creation by the main technical means of item 10 is that it can reduce the overall weight of the base plate and facilitate the assembly of the decompression device.

本創作藉由第11項之主要技術手段所能達成之功效在於：藉此可提升該排氣凸輪的使用壽命，以及提升該減壓裝置的減壓效果與泛用性。 The effect that this creation can achieve through the main technical means of item 11 is that it can increase the service life of the exhaust cam and improve the decompression effect and versatility of the decompression device.

1‧‧‧內燃機 1‧‧‧ internal combustion engine

11‧‧‧活塞 11‧‧‧ Pistons

12‧‧‧汽缸頭 12‧‧‧ cylinder head

13‧‧‧凸輪軸 13‧‧‧ camshaft

131‧‧‧排氣凸輪 131‧‧‧Exhaust cam

14‧‧‧減壓裝置 14‧‧‧ Decompression device

15‧‧‧排氣搖臂 15‧‧‧Exhaust rocker

16‧‧‧燃燒室 16‧‧‧Combustion chamber

2‧‧‧減壓裝置 2‧‧‧ Decompression device

21‧‧‧基盤 21‧‧‧base plate

211‧‧‧軸孔 211‧‧‧shaft hole

212‧‧‧限位滑道 212‧‧‧Limit slide

2121‧‧‧止擋部 2121‧‧‧stop

213‧‧‧勾設部 213‧‧‧Set up department

22‧‧‧配重擺臂 22‧‧‧ Counterweight swing arm

221‧‧‧樞軸孔 221‧‧‧ Pivot Hole

222‧‧‧勾孔 222‧‧‧Hook hole

223‧‧‧通孔 223‧‧‧through hole

224‧‧‧連結梢 224‧‧‧ Link

225‧‧‧限位凸塊 225‧‧‧ limit bump

23‧‧‧彈性元件 23‧‧‧Elastic element

24‧‧‧減壓凸輪元件 24‧‧‧ Decompression cam element

241‧‧‧驅動段 241‧‧‧Drive section

2411‧‧‧嵌設槽 2411‧‧‧Embedded groove

242‧‧‧減壓凸輪段 242‧‧‧Decompression cam section

2421‧‧‧弧形部 2421‧‧‧Arc

2421a‧‧‧外端緣 2421a‧‧‧Outer edge

2422‧‧‧第一切口部 2422‧‧‧First cut

2423‧‧‧第二切口部 2423‧‧‧Second Notch

2424‧‧‧第三切口部 2424‧‧‧ Third cut

243‧‧‧轉軸段 243‧‧‧rotation shaft

2431‧‧‧藏油部 2431‧‧‧Reservoir Department

25‧‧‧軸桿 25‧‧‧ shaft

3‧‧‧凸輪軸 3‧‧‧ camshaft

31‧‧‧排氣凸輪 31‧‧‧Exhaust cam

311‧‧‧凸部 311‧‧‧ convex

312‧‧‧基圓部 312‧‧‧Base round

312a‧‧‧外端緣 312a‧‧‧outer edge

313‧‧‧嵌設孔 313‧‧‧Embedded holes

32‧‧‧進氣凸輪 32‧‧‧Air intake cam

4‧‧‧排氣搖臂 4‧‧‧Exhaust rocker

41‧‧‧頂推滾輪 41‧‧‧Ejection roller

42‧‧‧頂推凸柱 42‧‧‧ Pushing convex column

A‧‧‧內燃機 A‧‧‧ Internal combustion engine

L‧‧‧排氣搖臂樞軸中心至頂推滾輪轉動中心的長度 L‧‧‧ Length from the pivot center of the exhaust rocker arm to the pivot center of the ejection roller

L1‧‧‧排氣搖臂樞軸中心至頂推凸柱中心的長度 L1‧‧‧The length from the pivot center of the exhaust rocker to the center of the ejector column

圖一係習用內燃機的減壓裝置示意圖。 Figure 1 is a schematic diagram of a pressure reducing device for a conventional internal combustion engine.

圖二係本創作內燃機的減壓裝置示意圖。 Figure 2 is a schematic diagram of the decompression device of the original internal combustion engine.

圖三係本創作內燃機的減壓裝置分解圖。 Figure 3 is an exploded view of the decompression device of the internal combustion engine of the present invention.

圖四係本創作的減壓裝置組立圖。 Figure 4 is an assembly diagram of the decompression device of this creation.

圖五係本創作的減壓裝置的減壓凸輪元件另一實施例。 FIG. 5 is another embodiment of the decompression cam element of the decompression device of the present invention.

圖六係本創作內燃機的減壓裝置減壓狀態示意圖。 Figure 6 is a schematic diagram of the decompression state of the decompression device of the internal combustion engine.

圖七係本創作內燃機的減壓裝置未減壓狀態示意圖。 Fig. 7 is a schematic diagram of the uncompressed state of the pressure reducing device of the internal combustion engine of the present invention.

圖八、九係本創作內燃機的減壓裝置與排氣搖臂動作示意圖。 Figures VIII and IX show the action of the pressure reducing device and exhaust rocker of the original internal combustion engine.

為使 貴審查員更容易了解本創作之結構及所能達成之功效，茲配合圖式說明如下；首先，請參閱圖二、三、四所示，本創作之內燃機的減壓裝 置，該減壓裝置2係組設於凸輪軸3上，該凸輪軸3上具一排氣凸輪31及一進氣凸輪32，該減壓裝置2係鄰近於該凸輪軸3的該排氣凸輪31，該減壓裝置2包括有一基盤21、一配重擺臂22、一彈性元件23、一減壓凸輪元件24及一軸桿25。 In order to make it easier for your examiners to understand the structure of this creation and the effect it can achieve, we will explain it with the diagrams below. First, please refer to Figures 2, 3, and 4. The decompression device 2 is arranged on the camshaft 3, and the camshaft 3 is provided with an exhaust cam 31 and an intake cam 32. The decompression device 2 is the exhaust gas adjacent to the camshaft 3. The cam 31, the decompression device 2 includes a base plate 21, a counterweight swing arm 22, an elastic element 23, a decompression cam element 24, and a shaft 25.

如圖二、三、四、八、九所示，該排氣凸輪31於該凸部311的相對側端的基圓部312上設有一嵌設孔313，該嵌設孔313開口方向係朝向該減壓裝置2，由於該嵌設孔313係設於該排氣凸輪31外周緣內，藉此可使該排氣凸輪31的基圓部312維持完整的外周緣；該排氣凸輪31可頂底一排氣搖臂4，該排氣搖臂4的一端設有頂推滾輪41，於該排氣搖臂4的一端的側邊凸設一頂推凸柱42，該排氣搖臂4可頂推一排氣閥門(圖式中未繪出)使其開啟，進一步該排氣搖臂4的排氣搖臂樞軸中心至頂推滾輪轉動中心的長度L小於排氣搖臂樞軸中心至頂推凸柱中心的長度L1，藉此可提升該排氣搖臂4抵壓排氣閥門的效果。 As shown in FIGS. 2, 3, 4, 8, and 9, the exhaust cam 31 is provided with an embedded hole 313 on the base circle portion 312 on the opposite side end of the convex portion 311, and the opening direction of the embedded hole 313 is directed toward the In the pressure reducing device 2, since the embedding hole 313 is provided in the outer periphery of the exhaust cam 31, the base circle portion 312 of the exhaust cam 31 can maintain a complete outer periphery; An exhaust rocker arm 4 is provided at the bottom. An ejection roller 41 is provided at one end of the exhaust rocker arm 4. An ejection projection 42 is protruded from a side of one end of the exhaust rocker arm 4. The exhaust rocker arm 4 An exhaust valve (not shown in the figure) can be pushed to open it, and further, the length L from the pivot center of the exhaust rocker arm of the exhaust rocker arm 4 to the rotation center of the push roller is smaller than the pivot axis of the exhaust rocker arm. The length L1 from the center to the center of the protruding column can increase the effect of the exhaust rocker arm 4 against the exhaust valve.

如圖二、三、四所示，該基盤21係略呈扇形狀體，該基盤21的扇形狀體不超過180度，該基盤21係以一體成形方式形成於凸輪軸3上，或以另一構件方式緊配於該凸輪軸3上，該基盤21並鄰近於該排氣凸輪31；更具體的說，該基盤21係被安裝在遠離該進氣凸輪32而位於該排氣凸輪31的側旁，即該凸輪軸3上依序係進氣凸輪32、排氣凸輪31與該基盤21；該基盤21設有一軸孔211，於該軸孔211的相對端以段差方式設有一限位滑道212，該限位滑道212於遠離該軸孔211的一端具有翹起狀的止擋部2121；該基盤21於該軸 孔211與該限位滑道212之間設有一勾設部213，該勾設部213可供該彈性元件23一端的勾設。 As shown in Figures 2, 3, and 4, the base plate 21 is a slightly fan-shaped body, and the fan-shaped body of the base plate 21 does not exceed 180 degrees. The base plate 21 is formed on the camshaft 3 in an integrally formed manner, or another A component manner is closely fitted to the camshaft 3, and the base plate 21 is adjacent to the exhaust cam 31; more specifically, the base plate 21 is installed away from the intake cam 32 and located on the exhaust cam 31. On the side, that is, the camshaft 3 sequentially connects the intake cam 32, the exhaust cam 31, and the base plate 21; the base plate 21 is provided with a shaft hole 211, and a limit position is provided at the opposite end of the shaft hole 211 in a stepwise manner. A slideway 212, the limit slideway 212 has a raised stop 2121 at an end far from the shaft hole 211; the base plate 21 is on the shaft A hooking portion 213 is provided between the hole 211 and the limiting slide 212, and the hooking portion 213 can be used for hooking one end of the elastic element 23.

如圖二、三、四所示，該配重擺臂22係為一略呈U形的弧形體，該配重擺臂22一端設一樞軸孔221，該樞軸孔221係與該基盤21的軸孔211相對應，藉此該配重擺臂22可藉由該軸桿25來穿設於該樞軸孔221與該基盤21的該軸孔211，進而來使該配重擺臂22得以被樞設於該基盤21，並以該軸桿25為擺動中心自己的擺動；該配重擺臂22於鄰近該樞軸孔221近旁設有一勾孔222，該勾孔222可供該彈性元件23一端的勾設，更明確的說，該彈性元件23一端勾設於該基盤21的該勾設部213上，另一端則勾設於該勾孔222上；該配重擺臂22於該勾孔222相對端設一貫通該配重擺臂22的通孔223，該通孔223可供一連結梢224插設，該配重擺臂22於該通孔223的上方朝該基盤21方向凸設有一限位凸塊225，該限位凸塊225可被限制於該基盤21的該限位滑道212作限制性的滑動，更明確的說，當該配重擺臂22被該凸輪軸3帶動產生離心力而擺動時，該配重擺臂22可藉由該限位凸塊225於該基盤21的該限位滑道212上限制性的滑動，而限制該配重擺臂22的擺動幅度。 As shown in Figures 2, 3, and 4, the counterweight swing arm 22 is a U-shaped arc-shaped body. One end of the counterweight swing arm 22 is provided with a pivot hole 221, and the pivot hole 221 is connected with the The shaft hole 211 of the base plate 21 corresponds, whereby the weight swing arm 22 can pass through the pivot hole 221 and the shaft hole 211 of the base plate 21 through the shaft rod 25, so as to make the weight swing The arm 22 can be pivoted on the base plate 21, and can swing on its own with the shaft 25 as a swing center. The counterweight swing arm 22 is provided with a hook hole 222 adjacent to the pivot hole 221. The hook hole 222 is provided for One end of the elastic element 23 is hooked, more specifically, one end of the elastic element 23 is hooked on the hook portion 213 of the base plate 21, and the other end is hooked on the hook hole 222; the counterweight swing arm 22 A through hole 223 is formed at the opposite end of the hook hole 222 and penetrates the counterweight swing arm 22. The through hole 223 can be inserted by a connecting tip 224, and the counterweight swing arm 22 faces the top of the through hole 223. A limiting protrusion 225 is convexly protruded in the direction of the base plate 21, and the limiting protrusion 225 can be restricted to the limiting slide 212 of the base plate 21 for restrictive sliding. More specifically, when the counterweight swing arm 22 By the camshaft 3 When the centrifugal force is generated to drive and swing, the counterweight swing arm 22 can restrict the swing of the counterweight swing arm 22 by restricting sliding of the limit projection 225 on the limit slide 212 of the base plate 21. .

如圖二、三、四、五、六、七、八、九所示，該減壓凸輪元件24由該配重擺臂22朝該排氣凸輪31方向依序設有驅動段241、減壓凸輪段242及轉軸段243；該驅動段241上凹設有一略成U形狀的嵌設槽2411，該嵌設槽2411可供插設於該配重擺臂22該通孔223的該連結梢224嵌設，藉此當該配重擺臂22擺動後被該彈性 元件23的彈性力拉回原位時，該配重擺臂22可藉由該連結梢224來使該減壓凸輪元件24轉動一角度；該減壓凸輪段242由徑向觀示係位於該排氣凸輪31面寬之外且呈並列方式設置，該減壓凸輪段242的轉動中心與該排氣凸輪31的轉動中心呈偏離並且成平行設置，該減壓凸輪段242具有弧形部2421與位於該弧形部2421相對側的第一切口部2422與第二切口部2423，該弧形部2421的外端緣2421a凸出於該排氣凸輪31的該基圓部312外端緣312a約略為0．1mm至0．9mm之間，該弧形部2421的外端緣2421a可供該排氣搖臂4的該頂推凸柱42頂抵，藉此可使該排氣凸輪31未頂抵該排氣搖臂4前，該排氣搖臂4先令該排氣閥作一小的開度；其中，經創作人實測，當該弧形部2421的外端緣2421a凸出於該排氣凸輪31的該基圓部312外端緣312a約略為0．1mm至0．8mm之間時對於釋壓效果較佳，當該弧形部2421的外端緣2421a凸出於該排氣凸輪31的該基圓部312外端緣312a約略為0．6mm至0．8mm之間時對於頂抵時的噪音減少效果較佳；該減壓凸輪段242於該第一切口部2422與第二切口部2423之間進一步的設置有一第三切口部2424，藉此可有效降低該弧形部2421相對側的高度；該轉軸段243係可嵌插於該排氣凸輪31的該嵌設孔313，藉此該排氣凸輪31帶動該配重擺臂22擺動，該配重擺臂22帶動減壓凸輪元件24轉動一角度；該轉軸段243上設有一直徑較小的藏油部2431，該藏油部2431可供些許機油的收容，藉此可減少機油濃度過高時的油阻抗對於該減壓凸輪元件24轉動阻力的產生。 As shown in Figures 2, 3, 4, 5, 6, 7, 8, and 9, the decompression cam element 24 is sequentially provided with a driving section 241 and decompression by the counterweight swing arm 22 toward the exhaust cam 31. The cam section 242 and the shaft section 243; the driving section 241 is recessed with a slightly U-shaped embedded groove 2411, and the embedded groove 2411 can be inserted into the connecting tip of the through-hole 223 of the counterweight swing arm 22. 224 is embedded, so that when the weight swing arm 22 swings, it is elastic When the elastic force of the element 23 is pulled back to the original position, the counterweight swing arm 22 can rotate the decompression cam element 24 by an angle through the connecting tip 224; the decompression cam segment 242 is located in the radial view system. The exhaust cam 31 is arranged in a side-by-side manner beyond the width of the surface. The rotation center of the decompression cam section 242 is offset from the rotation center of the exhaust cam 31 and is arranged in parallel. The decompression cam section 242 has an arc portion 2421. The first notch portion 2422 and the second notch portion 2423 located on the side opposite to the arc portion 2421, and an outer edge 2421 a of the arc portion 2421 protrudes from an outer edge of the base circle portion 312 of the exhaust cam 31. 312a is approximately between 0.1mm and 0.9mm, and the outer edge 2421a of the curved portion 2421 can be pressed against by the pushing protrusion 42 of the exhaust rocker arm 4, thereby enabling the exhaust cam 31 Before the exhaust rocker arm 4 is pressed against, the exhaust rocker arm 4 first makes the exhaust valve a small opening; wherein, as measured by the creator, when the outer edge 2421a of the curved portion 2421 protrudes, When the outer end edge 312a of the base circle portion 312 of the exhaust cam 31 is approximately between 0.1 mm and 0.8 mm, the pressure relief effect is better. When the outer end edge 2421a of the arc portion 2421 is convex Because the outer end edge 312a of the base circle portion 312 of the exhaust cam 31 is approximately between 0.6 mm and 0.8 mm, the noise reduction effect is better when it is pressed against; the decompression cam section 242 is at the first A third notch portion 2424 is further provided between the notch portion 2422 and the second notch portion 2423, so that the height of the opposite side of the curved portion 2421 can be effectively reduced; the rotating shaft segment 243 can be inserted into the exhaust cam The embedded hole 313 of 31, whereby the exhaust cam 31 drives the counterweight swing arm 22 to swing, and the counterweight swing arm 22 drives the decompression cam element 24 to rotate at an angle; the rotation shaft section 243 is provided with a smaller diameter The oil storage portion 2431 can be used for accommodating a little oil, thereby reducing the oil resistance to the rotation resistance of the decompression cam element 24 when the oil concentration is too high.

如圖二、六、七、八、九所示，本創作減壓裝置2的實施，該內燃機A未啟動作動時，由於該減壓裝置2的該減壓凸輪元件24該減壓凸輪段242的該弧形部2421係略凸出該排氣凸輪31的該基圓部312，因此可對排氣搖臂4的該頂推凸柱42形成推頂，進而可使排氣閥門形成微開狀；當該內燃機A一啟動後，該減壓裝置2的該配重擺臂22隨著該凸輪軸3的轉動所產生之離心力，即會以該軸桿25為擺動中心做擺動，當該配重擺臂22產生擺動後，該配重擺臂22以該連結梢224來使該減壓凸輪元件24轉動一角度，該減壓凸輪元件24即會轉成以該第一切口部2422與第二切口部2423對應該排氣搖臂4的該頂推凸柱42，由於該第一切口部2422與第二切口部2423較該弧形部2421低，因該減壓凸輪元件24該減壓凸輪段242的該弧形部2421不再推頂排氣搖臂4的該頂推凸柱42；另由於該配重擺臂22的限位凸塊225位於該基盤21的限位滑道212內，因此藉由該配重擺臂22可藉由該限位凸塊225於該基盤21的該限位滑道212上限制性的滑動，而限制該配重擺臂22的擺動幅度。 As shown in FIGS. 2, 6, 7, 8, and 9, in the implementation of the decompression device 2 of the present invention, when the internal combustion engine A is not started, the decompression cam element 24 of the decompression device 2 and the decompression cam section 242 The curved portion 2421 protrudes slightly from the base circle portion 312 of the exhaust cam 31, so that the ejection protrusion 42 of the exhaust rocker arm 4 can be ejected, and the exhaust valve can be slightly opened. As soon as the internal combustion engine A is started, the centrifugal force generated by the weight swing arm 22 of the pressure reducing device 2 with the rotation of the camshaft 3 will swing with the shaft 25 as the swing center. After the counterweight swing arm 22 is swung, the counterweight swing arm 22 rotates the decompression cam element 24 by the connecting tip 224 by an angle, and the decompression cam element 24 is turned into the first cutout portion 2422. The push-out boss 42 corresponding to the exhaust rocker arm 4 corresponding to the second cut-out portion 2423 is lower than the arc-shaped portion 2421 because the first cut-out portion 2422 and the second cut-out portion 2423 are lower. The arc-shaped portion 2421 of the decompression cam segment 242 no longer pushes the push-up protrusion 42 of the exhaust rocker arm 4; and because of the limit protrusion 225 of the weight swing arm 22 The limit slideway 212 of the base plate 21, so the weight swing arm 22 can restrict the sliding of the limit protrusion 225 on the limit slideway 212 of the base plate 21 to restrict the allocation. The swing amplitude of the swing arm 22.

承上述，本創作減壓裝置2於實施，該排氣搖臂4可不設置該頂推凸柱42，該內燃機A未啟動作動時，該減壓裝置2的該減壓凸輪元件24該減壓凸輪段242的該弧形部2421係略凸出該排氣凸輪31的該基圓部312，因此可對排氣搖臂4的該頂推滾輪41形成推頂，進而可使排氣閥門形成微開狀，亦可達到該內燃機A於低轉轉速時即可達成啟動減壓效果。 Continuing from the above, the decompression device 2 of the present invention is implemented. The exhaust rocker arm 4 may not be provided with the ejection boss 42. When the internal combustion engine A is not started, the decompression cam element 24 of the decompression device 2 decompresses. The curved portion 2421 of the cam segment 242 protrudes slightly from the base circle portion 312 of the exhaust cam 31, so that the ejection roller 41 of the exhaust rocker arm 4 can be ejected, and the exhaust valve can be formed. Slightly opened, the internal combustion engine A can also achieve the effect of starting decompression at low rotation speed.

本創作之主要功效在於，藉由該減壓凸輪元件24由該配重 擺臂22朝該排氣凸輪31方向依序設有驅動段241、減壓凸輪段242及轉軸段243；該驅動段241設有一嵌設槽2411，該嵌設槽2411可供插設於該配重擺臂22該通孔223的該連結梢224嵌設，藉此當該配重擺臂22擺動後被該彈性元件23的彈性力拉回原位時，該配重擺臂22可藉由該連結梢224來使該減壓凸輪元件24轉動一角度；該減壓凸輪段242具有弧形部2421與位於該弧形部2421相對側的第一切口部2422與第二切口部2423，該弧形部2421的外端緣2421a可供該排氣搖臂4的該頂推凸柱42頂抵，藉此可使該排氣凸輪31未頂抵該排氣搖臂4前，該排氣搖臂4先令該排氣閥作一小的開度，藉此可使該內燃機A可於低轉轉速時即可達成啟動減壓效果，進而能便利啟動與控制啟動轉速，以及該內燃機A可以預設轉速值來減壓，俾能提升該減壓裝置2的減壓效果與泛用性。 The main effect of this creation is that by the decompression cam element 24 by the weight The swing arm 22 is sequentially provided with a driving section 241, a pressure reducing cam section 242, and a rotating shaft section 243 in the direction of the exhaust cam 31. The driving section 241 is provided with an embedded slot 2411, which can be inserted in the slot. The connecting tip 224 of the through hole 223 of the weighted swing arm 22 is embedded, whereby the weighted swing arm 22 can be borrowed by the elastic force of the elastic element 23 after the weighted swing arm 22 is swung back. The connecting cam 224 rotates the decompression cam element 24 by an angle; the decompression cam section 242 has an arcuate portion 2421 and a first notch portion 2422 and a second notch portion 2423 located on opposite sides of the arcuate portion 2421. The outer edge 2421a of the arc-shaped portion 2421 can be used to abut against the push-up protrusion 42 of the exhaust rocker arm 4, so that the exhaust cam 31 does not abut against the front of the exhaust rocker arm 4. The exhaust rocker arm 4 first makes the exhaust valve a small opening degree, thereby enabling the internal combustion engine A to achieve a starting decompression effect at a low rotation speed, thereby facilitating starting and controlling the starting speed, and The internal combustion engine A can be decompressed with a preset rotation speed value, which can improve the decompression effect and versatility of the decompression device 2.

本創作的第二功效在於；藉由該減壓凸輪段242具有弧形部2421與位於該弧形部2421相對側的第一切口部2422與第二切口部2423之間進一步設有一第三切口部2424，藉此可有效降低該弧形部2421相對側的高度，進而提升該減壓裝置2使用效果與泛用性。 The second effect of this creation is that a third portion is further provided between the decompression cam section 242 and the first cutout portion 2422 and the second cutout portion 2423 on the side opposite to the arced portion 2421. The cutout portion 2424 can effectively reduce the height of the opposite side of the arc-shaped portion 2421, thereby improving the use effect and versatility of the decompression device 2.

本創作第三功效在於；藉由該減壓凸輪元件24的轉軸段243設有一直徑較小的藏油部2431，藉此該藏油部2431可供些許機油的收容，藉此可減少機油濃度過高時的油阻抗對於該減壓凸輪元件24轉動阻力的產生，進而可確保該減壓凸輪元件24的轉動性。 The third effect of this creation lies in that: the rotating shaft section 243 of the decompression cam element 24 is provided with an oil storage portion 2431 having a smaller diameter, so that the oil storage portion 2431 can accommodate a little oil, thereby reducing the oil concentration When the oil resistance is too high, the resistance to rotation of the decompression cam element 24 is generated, thereby ensuring the rotation of the decompression cam element 24.

本創作第四功效在於；藉由由徑向觀示，該減壓凸輪段24 2係位於該排氣凸輪31面寬之外且呈並列方式設置，藉此可提升該排氣凸輪31的使用壽命。 The fourth effect of this creation is that, by a radial view, the decompression cam section 24 The 2 series is located outside the width of the exhaust cam 31 in a side-by-side manner, thereby improving the service life of the exhaust cam 31.

本創作第五功效在於；藉由該減壓凸輪段242的轉動中心與該排氣凸輪31的轉動中心呈偏離並且成平行設置，藉此可提升該排氣凸輪31的使用壽命。 The fifth effect of the present invention lies in that: the rotation center of the decompression cam section 242 is deviated from the rotation center of the exhaust cam 31 and is set in parallel, thereby the service life of the exhaust cam 31 can be improved.

本創作第六功效在於；藉由該弧形部2421的外端緣2421a凸出於該排氣凸輪31的該基圓部312的外端緣312a的高度不大於0．9mm，藉此可提升該減壓裝置2的減壓效果與降低噪音效果。 The sixth effect of this creation lies in that the height of the outer end edge 312a of the base circle portion 312 of the exhaust cam 31 by the outer end edge 2421a of the arc-shaped portion 2421 is not greater than 0.9 mm, thereby improving the height. The decompression effect and noise reduction effect of the decompression device 2.

本創作第七功效在於；藉由該弧形部2421的外端緣2421a凸出於該排氣凸輪31的該基圓部312的外端緣312a高度約略為0．1mm至0．8mm，藉此可使該減壓裝置2具備更較佳的減壓效果。 The seventh effect of this creation lies in that the height of the outer end edge 312a of the base circle portion 312 of the exhaust cam 31 by the outer end edge 2421a of the arc-shaped portion 2421 is approximately 0.1 mm to 0.8 mm. This allows the decompression device 2 to have a better decompression effect.

本創作第八功效在於；藉由該弧形部2421的外端緣2421a凸出於該排氣凸輪31的該基圓部312的外端緣312a高度約略為0．6mm至0．8mm之間，藉此可使該減壓裝置2具備較佳的降低噪音效果。 The eighth effect of this creation lies in that the height of the outer end edge 312a of the base circle portion 312 of the exhaust cam 31 by the outer end edge 2421a of the curved portion 2421 is approximately between 0.6 mm and 0.8 mm. Therefore, the decompression device 2 can have a better noise reduction effect.

本創作第九功效在於；藉由該排氣搖臂的排氣搖臂樞軸中心至頂推滾輪轉動中心的長度L小於排氣搖臂樞軸中心至頂推凸柱中心的長度L1，藉此可提升該排氣搖臂4抵壓排氣閥門的效果。 The ninth effect of this creation lies in that the length L of the pivot center of the exhaust rocker arm to the rotation center of the ejection roller is smaller than the length L1 of the pivot center of the exhaust rocker arm to the center of the ejection column. This can improve the effect of the exhaust rocker arm 4 against the exhaust valve.

本創作第十功效在於；藉由該基盤21係與該凸輪軸3一體成形所構成，且位於鄰近該排氣凸輪31處，該基盤21呈扇形狀，藉此可減輕該基盤21整體重量，以及便利該減壓裝置2的組裝。 The tenth effect of this creation is that the base plate 21 is formed integrally with the camshaft 3 and is located adjacent to the exhaust cam 31. The base plate 21 has a fan shape, thereby reducing the overall weight of the base plate 21, And facilitate the assembly of the decompression device 2.

本創作的第十一功效在於；藉由由徑向觀示，該減壓凸輪段242係位於該排氣凸輪31面寬之外且呈並列方式設置；該排氣搖臂4的一端凸設有頂推凸柱42，藉此可提升該排氣凸輪31的使用壽命，以及提升該減壓裝置2的減壓效果與泛用性。 The eleventh effect of this creation lies in: by a radial view, the decompression cam section 242 is located outside the width of the exhaust cam 31 and is arranged side by side; one end of the exhaust rocker arm 4 is convexly arranged The protruding post 42 is pushed up, thereby improving the service life of the exhaust cam 31 and improving the decompression effect and versatility of the decompression device 2.

本創作之內燃機的減壓裝置藉由上述之構造，確能達到訴求之目的，應已符合新型專利之新穎性、進步性及產業利用性之要件，爰依法提出新型專利之申請，祈請 貴審查委員之詳鑑，並賜核准新型專利之審定，至感德便。 The pressure reducing device of the internal combustion engine created by this creation can indeed achieve the purpose of appeal. It should meet the requirements for the novelty, progress, and industrial use of the new patent, and apply for a new patent in accordance with the law. The detailed examination of the review committee and the approval of the approval of the new patent are of great virtue.

Claims (11)

一種內燃機的減壓裝置，該減壓裝置係組設於凸輪軸上，該凸輪軸具有進氣凸輪及排氣凸輪，該排氣凸輪具有凸部與基圓部，該排氣凸輪可頂推一排氣搖臂；該減壓裝置包括有一設於該凸輪軸上並鄰近於該排氣凸輪的基盤、一連結於該基盤的配重擺臂、一勾設於該基盤與該配重擺臂之間的彈性元件、一連接於該排氣凸輪上並可被該配重擺臂帶動的減壓凸輪元件及一穿設於該基盤與該配重擺臂的軸桿，其特徵在於：該減壓凸輪元件由該配重擺臂朝該排氣凸輪方向依序設有驅動段、減壓凸輪段及轉軸段，該減壓凸輪元件可被該配重擺臂轉動一角度，該減壓凸輪段具有弧形部與位於該弧形部相對側的第一切口部與第二切口部。A decompression device for an internal combustion engine. The decompression device is arranged on a camshaft. The camshaft has an intake cam and an exhaust cam. The exhaust cam has a convex portion and a base circle portion. The exhaust cam can be pushed up. An exhaust rocker arm; the decompression device includes a base plate provided on the camshaft and adjacent to the exhaust cam, a weight swing arm connected to the base plate, a hook attached to the base plate and the weight swing The elastic element between the arms, a decompression cam element connected to the exhaust cam and driven by the counterweight swing arm, and a shaft rod passing through the base plate and the counterweight swing arm are characterized in that: The decompression cam element is sequentially provided with a driving section, a decompression cam section, and a rotating shaft section from the counterweight swing arm toward the exhaust cam direction. The decompression cam element can be rotated by an angle by the counterweight swing arm. The pressing cam section has an arc-shaped portion and a first notch portion and a second notch portion located on opposite sides of the arc-shaped portion. 如申請專利範圍第1項所述之內燃機的減壓裝置，其中，該減壓凸輪段具有弧形部與位於該弧形部相對側的第一切口部與第二切口部之間進一步設有一第三切口部。The decompression device for an internal combustion engine according to item 1 of the scope of patent application, wherein the decompression cam section has an arcuate portion and a first slit portion and a second slit portion located on opposite sides of the arc portion. There is a third cutout portion. 如申請專利範圍第1項所述之內燃機的減壓裝置，其中，該減壓凸輪元件的轉軸段設有一直徑較小的藏油部。The pressure reducing device for an internal combustion engine according to item 1 of the scope of patent application, wherein the rotating shaft section of the pressure reducing cam element is provided with an oil reservoir with a smaller diameter. 如申請專利範圍第1項所述之內燃機的減壓裝置，其中，由徑向觀示，該減壓凸輪段係位於該排氣凸輪面寬之外且呈並列方式設置。The decompression device for an internal combustion engine according to item 1 of the scope of patent application, wherein the decompression cam section is located outside the width of the exhaust cam surface and is arranged side by side in a radial view. 如申請專利範圍第1項所述之內燃機的減壓裝置，其中，該減壓凸輪段的轉動中心與該排氣凸輪的轉動中心呈偏離並且成平行設置。The decompression device for an internal combustion engine according to item 1 of the scope of patent application, wherein the rotation center of the decompression cam section is offset from the rotation center of the exhaust cam and is disposed in parallel. 如申請專利範圍第1項所述之內燃機的減壓裝置，其中，該弧形部的外端緣凸出於該排氣凸輪的該基圓部的外端緣的高度不大於0．9mm。The pressure reducing device for an internal combustion engine according to item 1 of the scope of patent application, wherein the height of the outer end edge of the curved portion protruding from the outer end edge of the base round portion of the exhaust cam is not greater than 0.9 mm. 如申請專利範圍第6項所述之內燃機的減壓裝置，其中，該弧形部的外端緣凸出於該排氣凸輪的該基圓部的外端緣高度約略為0．1mm至0．8mm。The pressure reducing device for an internal combustion engine according to item 6 of the scope of patent application, wherein the height of the outer end edge of the curved portion protruding from the outer end edge of the base round portion of the exhaust cam is approximately 0.1 mm to 0. .8mm. 如申請專利範圍第6項所述之內燃機的減壓裝置，其中，該弧形部的外端緣凸出於該排氣凸輪的該基圓部的外端緣高度約略為0．6mm至0．8mm之間。The pressure reducing device for an internal combustion engine according to item 6 of the scope of patent application, wherein the height of the outer end edge of the curved portion protruding from the outer end edge of the base round portion of the exhaust cam is approximately 0.6 mm to 0. .8mm. 如申請專利範圍第1項所述之內燃機的減壓裝置，其中，該排氣搖臂的排氣搖臂樞軸中心至頂推滾輪轉動中心的長度小於該排氣搖臂樞軸中心至頂推凸柱中心的長度。The pressure reducing device for an internal combustion engine according to item 1 of the scope of patent application, wherein the length from the pivot center of the exhaust rocker of the exhaust rocker arm to the rotation center of the push roller is shorter than the pivot center of the exhaust rocker arm to the top Push the length of the center of the convex post. 如申請專利範圍第1項所述之內燃機的減壓裝置，其中，該基盤係與該凸輪軸一體成形所構成，且位於鄰近該排氣凸輪處；該基盤呈扇形狀。The pressure reducing device for an internal combustion engine according to item 1 of the scope of patent application, wherein the base plate is integrally formed with the camshaft and is located adjacent to the exhaust cam; the base plate has a fan shape. 如申請專利範圍第1項所述之內燃機的減壓裝置，其中，由徑向觀示，該減壓凸輪段係位於該排氣凸輪面寬之外且呈並列方式設置；該排氣搖臂的一端凸設有頂推凸柱。The decompression device for an internal combustion engine according to item 1 of the scope of patent application, wherein the decompression cam segment is located outside the width of the exhaust cam surface and is arranged in a side-by-side view from a radial view; the exhaust rocker arm One end is convexly provided with a pushing convex column.
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